The Reds continued their unbeaten streak thanks to a first-half goal from Sadio Mane.
"I wasn't pleased with how we managed the game in the second half, not always," said the Reds boss. "We had bad moments.
"Wolves weren't attacking as high anymore, we had passing options. There is no chance to recover in a game if you don't keep the ball. You have to do it when in possession.
That's not a calm thing, it's a very lively thing. It's about being smart, play against movement and half spaces.
"Naby and later Millie (James Milner) helped immediately. You could see that."
Klopp added: "The other boys, my God. Adam and Gini (Wijnaldum). How they played today effort-wise, miles wise it was really great.
"But fresh players in the half spaces helped. Then we caused again problems but we didn't finish it off. It wasn't a game for two or three goals tonight.
"We just had to fight until the end. I have no problem for that."